Perhaps you should try some spelling variations:
tang hanh » tang thanh, dang hanh, nang hanh
va triet » va thiet, va trien, ve triet
hanh dai » hanh tai, hanh dao, vanh dai
sach thu » sach thue, sach thieu, sach tham
duc tang » duc thang, duc tan, tuc tang
ve chat » va chat, van chat
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
ve cham » va cham, vu cham, ve chim
dai va » mai va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu ((ve cham) OR (ve chat)) duc tang hanh dai va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach thu)) nang xa hoi. hieu ((ve cham) OR (ve chat)) duc tang hanh dai va triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. hieu ((ve cham) OR (ve chat)) duc tang hanh dai va triet*.